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I am having an issue that I can not explain I purchased Rush by Centeon 16G USB Memory Stick and I copied a bunch of stuff on it to transfer to another machine. I put a folder that I name Media with a bunch of well media files (video) that I copied from my MacBook Pro (10.6.8). I put approximately 8 gig on it.

Plugged it in to my iMac which an older machine not sure what OS. Transferred the files and then plugged it back into my MacBook Pro, deleted all the files and checked. When I open up the UBS Memory stick it still says there is about 7.9 Gig available but there is nothing on it, I tried ejecting it and plugging it back in with same results.

If I go to Disk Utility it calls it out to be a 16.59 formatted MS-DOS FAT.

I have noticed this happening before with other EXT HD and EXT USB Sticks. Never paid attention before but it would just eventually start to show up with the correct amount of memory. The Centeon has not corrected itself yet.

I went to Disk Utility and did an Erase and left the format at MS-DOS FAT.
Any ideas?

Then I copied some files on it (about 2gig) from the MacBook Pro and it said 14.69G available. Next I just deleted the files of the memory stick. By deleting I am referring to dragging the files to the trashcan.It still says it only has 14.69G available and I know this is true because I then put 15g of files in small folders and began to copy them, when I get to where itI copied 13g I then copy a 2g folder and it says there is not enough room. I even went as far to leave the 13g in there and have it say there is space for 5.8g and then deleted everything off it and it still says the same. Then I tried copying 8g on it and I get the message about not enough space.

So this is what I know;

When I delete files off my memory stick or any EXT HD it doesn't seem to release the space.

It does it on My MacBook Pro.

I am formatted MS DOS FAT.

Is there a way to look at the USB Stick Properties like in WIndows?

I know there are issue with MS DOS FAT with it not transferring files over 4g, this will transfer folders over 4g but with no files above 800mb.